prechambers mods?
prechambers mods?
My first one is complete- on a 617-95X
Measurements in drill bits sizes. I used a "Rigid" coldfire set from a local store. The bottom hole did not fit a 5/64, I drilled it to 5/64. The back two were slightly smaller than a 3/32, I drilled them to 1/8. The front two on either side were 1/8, I drilled them to 11/64. The front center was only slightly larger than the other two at +1/8, I drilled it to 11/64. Hand drilled with the PC in a vice. The bits were new and I put whatever sized fit into the hole and positioned the PC so it was straight; (and then removed it) that way I enlarged the holes in the same orientation. No oil used. I then used a countersink to smooth the edges slightly of all the holes except the bottom. It was easier than I thought. I hope to get the other four done tomorrow and installed within a week.